[PATCH 3/5] powerpc/lib: checksum GUAP support

[LEROY Christophe]

Same comment as for futex

Christophe

Russell Currey <ruscur at russell.cc> a écrit :

> Wrap the checksumming code in GUAP locks and unlocks.
>
> Signed-off-by: Russell Currey <ruscur at russell.cc>
> ---
>  arch/powerpc/lib/checksum_wrappers.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/arch/powerpc/lib/checksum_wrappers.c  
> b/arch/powerpc/lib/checksum_wrappers.c
> index a0cb63fb76a1..c67db0a6e18b 100644
> --- a/arch/powerpc/lib/checksum_wrappers.c
> +++ b/arch/powerpc/lib/checksum_wrappers.c
> @@ -28,6 +28,7 @@ __wsum csum_and_copy_from_user(const void __user  
> *src, void *dst,
>  {
>  	unsigned int csum;
>
> +	unlock_user_access();
>  	might_sleep();
>
>  	*err_ptr = 0;
> @@ -60,6 +61,7 @@ __wsum csum_and_copy_from_user(const void __user  
> *src, void *dst,
>  	}
>
>  out:
> +	lock_user_access();
>  	return (__force __wsum)csum;
>  }
>  EXPORT_SYMBOL(csum_and_copy_from_user);
> @@ -69,6 +71,7 @@ __wsum csum_and_copy_to_user(const void *src, void  
> __user *dst, int len,
>  {
>  	unsigned int csum;
>
> +	unlock_user_access();
>  	might_sleep();
>
>  	*err_ptr = 0;
> @@ -97,6 +100,7 @@ __wsum csum_and_copy_to_user(const void *src,  
> void __user *dst, int len,
>  	}
>
>  out:
> +	lock_user_access();
>  	return (__force __wsum)csum;
>  }
>  EXPORT_SYMBOL(csum_and_copy_to_user);
> --
> 2.19.1